C++ (Cpp) bitpop Examples

Example #1

File: libpbm1.c Project: gguillotte/netpbm-code

bit
pbm_backgroundbitrow(unsigned const char * const packedBits,
                     unsigned int          const cols,
                     unsigned int          const offset) {
    /*----------------------------------------------------------------------------
      PBM version of pnm_backgroundxelrow() with additional offset parameter.
      When offset == 0, produces the same return value as does
      pnm_backgroundxelrow(promoted_bitrow, cols, ...)
    -----------------------------------------------------------------------------*/
    const unsigned char * const row = &packedBits[offset/8];
    unsigned int const rs = offset % 8;
    unsigned int const last = pbm_packed_bytes(cols + rs) - 1;

    unsigned int retval;

    bool const firstbit = (row[0] >> (7-rs)) & 0x01;
    bool const lastbit  = (row[last] >> (7- (cols+rs-1)%8)) & 0x01;

    if (firstbit == lastbit)
        retval = firstbit;
    else {
        if (bitpop(row, cols, rs) >= cols/2)
            retval = PBM_BLACK;
        else
            retval = PBM_WHITE;
    }
    return retval;
}

Example #2

File: matrix.c Project: Flight310/tmk_keyboard

uint8_t matrix_key_count(void)
{
    uint8_t count = 0;
    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
        count += bitpop(matrix[i]);
    }
    return count;
}

Example #3

File: matrix.c Project: doxkb/tmk_keyboard

uint8_t matrix_key_count(void)
{
    uint8_t count = 0;
    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
#if (MATRIX_COLS <= 8)
        count += bitpop(matrix[i]);
#else
        count += bitpop16(matrix[i]);
#endif
    }
    return count;
}

Example #4

File: action_util.c Project: 0xdec/qmk_firmware

/** \brief inspect keyboard state
 *
 * FIXME: needs doc
 */
uint8_t has_anymod(void)
{
    return bitpop(real_mods);
}